Abu Sufyan bin Sa'id bin al-Akhnas (may Allah have mercy on him) narrates that he went to his maternal aunt Umm Habibah (may Allah be pleased with her), the wife of the Prophet (peace and blessings be upon him), and she mixed sawiq (barley mash) for him and he drank it. She said: O my son, perform ablution (wudu), for I heard the Messenger of Allah (peace and blessings be upon him) saying: "Ablution is to be performed from whatever the fire has touched."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19770